Charles h



(No Model.)

0. H. BRIGDEN.

LOCK.

No. 604,576. Patented May 24,1898.

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CHARLES H. BRIGDEN, OF CANTON, MASSACHUSETTS, ASSIGNOR TO S. M. HAl/VES,J R, OF YONKERS, NEW YORK.

LOCK.

SPECIFICATION forming part of Letters Patent No. 604,576, dated May 24,1898..

Application filed July 17, 1896.

To all whom itmcty concern.-

Be it known that I, CHARLES H. BRIGDEN, a citizen of the United States,residing at Canton Junction, in the county of Norfolk and State ofMassachusetts, have invented certain new and useful Improvements inLocks, of which the following, taken in connection with the accompanyingdrawings, is a specification.

This invention has relation to locks and latches, and has for its objectto provide a simple lock which shall be constructed of but few parts andwhich shall likewise be substantially burglar-proof.

It is also the object to provide a look or latch which shall be incasedin a cylindrical casin g, so that the parts thereof shall be compact,and which latch or look may be held together without the employment ofscrews or rivets.

To these ends the invention consists of a lock or latch possessing thosefeatures, parts, and characteristics which I shall now proceed todescribe, and point out with particularity in the claims heretoappended.

Of the drawings, Figure 1 is a side vertical section through the door,showing one form of my improved lock. Fig. 2 is a front vertical sectionthrough the door, showing the lock in front view. Figs. 3 and 4illustrate in perspective and in side view the lock-casing. Fig. 5illustrates the peculiar bolt which is employed in connection with thelock shown in the above-described figures. Fig. 6 illustrates thetumblers, which are held in the casing without the use of screws. Fig. 7is a vertical section through the casing, so as to show the tumblers inposition. Fig. 8 is a vertical section through a slightly-modified formof lock. Fig. 9 is a similar section through the bolt, so as toillustrate the tumblers, the casing being removed. Fig. 10 is a planview of the tumblers employed in the lock illustrated in Figs. 8 and 9.Fig. 1O illustrates the key employed for the lock shown in the foregoingfigures.

In carrying out my invention I employ a tubular cylindrical casing a, asshown in Figs. 3 and i, which is closed at the rear end and in which Imount the bolt or looking member I). The latter is peculiarlyconstructed-that is to say, it has the cylindrical head I), which SerialNo. 599,572. (No model.)

fits closely in the cylindrical aperture in the casing a, and twolongitudinal arms 0 0, each of which has two slots (1 d, in which thekey engages. Between the two arms there extends a pin 6, which alsoextends through the axial line of the bolt. There are also shoulders ffon the side of the bolt for a purpose to be described.

The casing a is provided with two notches g, cut through the wallsthereof to receive the webs h on the arms 1' of an escutcheonj. hen thewebs are slipped into the grooves, one of them extends between theshoulders ff, so as to retain the bolt in the casing and also so as toprevent it from twisting.

Between the arms 0 o of the bolt I place three tumblers 7;, Z, and an,all of the same general shape, and the end of each being extendedlaterally or diverging, so as to have the corners or fit closely withinand engage the walls of the casing. Each is provided in the end with atriangular slot, in which is mounted a single V-shaped spring 0, formedof sheet metal, and also of a width equal to the internal diameter ofthe casing.

Each tumbler is provided with a central aperture 19 to receive the keyand with an end slot 1, through which the pin 6 extends when thetumblers are in place.

Referring particularly to Figs. 1 to 7, inclusive, the tumblers are allformed differently, so that when they are side by side the apertures pin each are not in alinement, or, in other words, the said apertures arearranged in different positions vertically in said tumblers, so that theedges of the same project above each other. The ends of the tumblers arelikewise provided with stops 0", which whenthe tumblers are in theirnormal positions, which they assume under pressure of the spring 0, willprevent the bolt from moving longitudinally of the casing, inasmuch asthe pin 6 will be held stationary by the said stops, as will beunderstood by referring to Fig. 7 The tumblers therefore are capable ofan edgewise movement relative to each other, so that when the key isinserted and is turned the wards of the key are so shaped as to engagethe edges of the apertures 13 in the tumblers and move the tumblersedgewise, the stops 9' being thus thrust out of the way of the pin e, soas to allow the bolt to be moved forward by the wards .on the key. TheWards for the tumblers on the key are designated byt u 1;, respectively,while the wards which engage the notches d in the bolt are designated byw, as shown in Fig. 10

The tumblers in Fig. 7 are held from longitudinal movement in the casingby means of the Webs h on the escutcheon, which project through notchesin the casing, the said webs engaging shoulders 00 on the tumblers insuch Way as not to prevent them from moving in an edgewise position.

In Figs. 8, 9, and 10 I have illustrated a slightly different form oflock, in which the tumblers move longitudinally with the bolt. In thiscase the tumblers Z m have recesses a to receive a web or flange b inthe bolt, so as to hold the said tumblers and said bolt in connectionwith each other and so that when the bolt is moved forward the tumblersare moved with it. Instead of the tumblers being provided with stopswhich engage the pin on the bolt they are provided with stops 0 toengage the web h of the escutcheon. Therefore when the key is insertedin the casing and is turned the wards engage the tumblers to free thestops from the webs h and allow the further turning of the key to movethe bolt and the tumblers forward, as will be readily understood.

From the foregoing it will be observed that I have providedpeculiarly-acting tumblers which may be employed in connection withlocks and latches of various kinds.

I do not limit myself to the exact forms which I have shown, as thetumblers may be employed in other ways than those Which I haveillustrated and described.

By providing the tumblers, which are movable edgewise, in order to bringtheir stops into position to allow the movement of the bolt, I insurethe bolt against being removed by simple means, which may be easilyduplicated or repaired.

The flat tumblers may be stamped out of sheet metal, and the casing maybe struck out by dies, so that the whole lock may be quickly and at thesame time cheaply constructed.

Having thus explained the nature of the invention and those ways nowbest known to me for constructing and using the same, though withoutattempting to set forth all of the forms in which it may be made or allof the modes of its use, it is declared that what is claimed 1s,

1. A lock comprising a cylindrical casing, a bolt movable longitudinallyin said casing, and two or more flat key-actuated tumblers placedlongitudinally of the casing, and a stop for said tumblers, saidtumblers having laterally-extended rear ends to loosely engage theopposing inner walls of the casin g, whereby the said rear ends are heldagainst edgewise movement, and the forward ends are free to moveedgewise to permit the bolt to be shot.

2. Alock comprising a casing, two or more fiat tumblers arranged side byside to engage and hold the locking member against move ment, saidtumblers having laterally extended ends to engage the opposing innerwalls of the casin g, a stop for said tumblers and a l-shaped springinserted in notches in the said laterally-extended ends of the tumblersfor holding them in looking position.

3. A lock comprising a seamless casinghaving a cylindrical aperture withunobstructed sides for the insertion of the operative parts, two or morefiat tumblers arranged side by side independently of the bolt and havingstops to limit the movements of the bolt, a stop for said tumblers, anda bolt normally held against movement by the tumblers, said tumblersbeing free from positive connection with the casing but having rearcorners resting upon a wall of the .casing whereon they may oscillateand having means with which a key may be engaged in such way that thestops thereon will permit the bolt to be moved by the key.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 23d day of June, A. D.1896.

CHARLES H. BRIGDEN.

Witnesses:

MARCUS B. MAY, F. P. DAVIS.

